diff --git a/flow/designs/sky130hd/chameleon/config.mk b/flow/designs/sky130hd/chameleon/config.mk
index d02447831b..d56a272dfb 100644
--- a/flow/designs/sky130hd/chameleon/config.mk
+++ b/flow/designs/sky130hd/chameleon/config.mk
@@ -29,7 +29,7 @@ export ABC_AREA = 1
 
 export SDC_FILE      = $(DESIGN_HOME)/$(PLATFORM)/$(DESIGN_NICKNAME)/constraint.sdc
 
-export CORE_UTILIZATION       = 70
+export CORE_UTILIZATION       = 60
 export CORE_ASPECT_RATIO      = 1.3
 export CORE_MARGIN            = 2
 
diff --git a/tools/OpenROAD b/tools/OpenROAD
index 63ed2e0fe5..13c43547e3 160000
--- a/tools/OpenROAD
+++ b/tools/OpenROAD
@@ -1 +1 @@
-Subproject commit 63ed2e0fe5992099b7d528177bbb7a4df9523907
+Subproject commit 13c43547e393b4a74bcf3accf3c28bd1b3828731